private void parse_IEND_chunk()

in src/main/java/org/apache/xmlgraphics/image/codec/png/PNGImageDecoder.java [674:772]

• 88 lines of code
• 24 McCabe index (conditional complexity)

    private void parse_IEND_chunk(PNGChunk chunk) throws Exception {
        // Store text strings
        int textLen = textKeys.size();
        String[] textArray = new String[2 * textLen];
        for (int i = 0; i < textLen; i++) {
            String key = (String)textKeys.get(i);
            String val = (String)textStrings.get(i);
            textArray[2 * i] = key;
            textArray[2 * i + 1] = val;
            if (emitProperties) {
                String uniqueKey = "text_" + i + ':' + key;
                properties.put(uniqueKey.toLowerCase(Locale.getDefault()), val);
            }
        }
        if (encodeParam != null) {
            encodeParam.setText(textArray);
        }

        // Store compressed text strings
        int ztextLen = ztextKeys.size();
        String[] ztextArray = new String[2 * ztextLen];
        for (int i = 0; i < ztextLen; i++) {
            String key = (String)ztextKeys.get(i);
            String val = (String)ztextStrings.get(i);
            ztextArray[2 * i] = key;
            ztextArray[2 * i + 1] = val;
            if (emitProperties) {
                String uniqueKey = "ztext_" + i + ':' + key;
                properties.put(uniqueKey.toLowerCase(Locale.getDefault()), val);
            }
        }
        if (encodeParam != null) {
            encodeParam.setCompressedText(ztextArray);
        }

        // Parse prior IDAT chunks
        InputStream seqStream =
            new SequenceInputStream(Collections.enumeration(streamVec));
        InputStream infStream =
            new InflaterInputStream(seqStream, new Inflater());
        dataStream = new DataInputStream(infStream);

        // Create an empty WritableRaster
        int depth = bitDepth;
        if ((colorType == PNG_COLOR_GRAY)
            && (bitDepth < 8) && output8BitGray) {
            depth = 8;
        }
        if ((colorType == PNG_COLOR_PALETTE) && expandPalette) {
            depth = 8;
        }
        int bytesPerRow = (outputBands * width * depth + 7) / 8;
        int scanlineStride =
            (depth == 16) ? (bytesPerRow / 2) : bytesPerRow;

        theTile = createRaster(width, height, outputBands,
                               scanlineStride,
                               depth);

        if (performGammaCorrection && (gammaLut == null)) {
            initGammaLut(bitDepth);
        }
        if ((postProcess == POST_GRAY_LUT)
            || (postProcess == POST_GRAY_LUT_ADD_TRANS)
            || (postProcess == POST_GRAY_LUT_ADD_TRANS_EXP)) {
            initGrayLut(bitDepth);
        }

        decodeImage(interlaceMethod == 1);
        sampleModel = theTile.getSampleModel();

        if ((colorType == PNG_COLOR_PALETTE) && !expandPalette) {
            if (outputHasAlphaPalette) {
                colorModel = new IndexColorModel(bitDepth,
                                                 paletteEntries,
                                                 redPalette,
                                                 greenPalette,
                                                 bluePalette,
                                                 alphaPalette);
            } else {
                colorModel = new IndexColorModel(bitDepth,
                                                 paletteEntries,
                                                 redPalette,
                                                 greenPalette,
                                                 bluePalette);
            }
        } else if ((colorType == PNG_COLOR_GRAY)
                   && (bitDepth < 8) && !output8BitGray) {
            byte[] palette = expandBits[bitDepth];
            colorModel = new IndexColorModel(bitDepth,
                                             palette.length,
                                             palette,
                                             palette,
                                             palette);
        } else {
            colorModel =
                createComponentColorModel(sampleModel);
        }
    }